She was surprised to find the fridge empty；the children _____ everything !
| A．had been eating | B．had eaten |
| C．have eaten | D．have been eating |
—Why are your eyes so red? You _______ have slept well last night.
—Yeah, I stayed up late writing a report.
| A．can’t |
| B．mustn’t |
| C．needn’t |
| D．won’t |
21. The children lost in the woods; otherwise, they would have been at the lakeside camp as scheduled.
| A．must have got |
| B．must get |
| C．should have got |
| D．should get |
Harry is feeling uncomfortable. He _____ too much at the party last night.
| A．could drink |
| B．should drink |
| C．would have drunk |
| D．must have drunk |
When I was a child, I ______ watch TV whenever I wanted to.
| A．should |
| B．could |
| C．must |
| D．need |
He ________ sleep, although he tried to, when he got on such a hunt for an idea until he had caught it.
| A．wouldn’t |
| B．shouldn’t |
| C．couldn’t |
| D．mustn’t |